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-rw-r--r--board/bf537-stamp/flash.c403
1 files changed, 403 insertions, 0 deletions
diff --git a/board/bf537-stamp/flash.c b/board/bf537-stamp/flash.c
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index 0000000..42dcf06
--- /dev/null
+++ b/board/bf537-stamp/flash.c
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+/*
+ * U-boot - flash.c Flash driver for PSD4256GV
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ * This file is based on BF533EzFlash.c originally written by Analog Devices, Inc.
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <malloc.h>
+#include <config.h>
+#include <asm/io.h>
+#include "flash-defines.h"
+
+void flash_reset(void)
+{
+ reset_flash();
+}
+
+unsigned long flash_get_size(ulong baseaddr, flash_info_t * info, int bank_flag)
+{
+ int id = 0, i = 0;
+ static int FlagDev = 1;
+
+ id = get_codes();
+ if (FlagDev) {
+ FlagDev = 0;
+ }
+ info->flash_id = id;
+ switch (bank_flag) {
+ case 0:
+ for (i = PriFlashABegin; i < SecFlashABegin; i++)
+ info->start[i] = (baseaddr + (i * AFP_SectorSize1));
+ for (i = SecFlashABegin; i < NUM_SECTORS; i++)
+ info->start[i] =
+ (baseaddr + SecFlashAOff +
+ ((i - SecFlashABegin) * AFP_SectorSize2));
+ info->size = 0x400000;
+ info->sector_count = NUM_SECTORS;
+ break;
+ case 1:
+ info->start[0] = baseaddr + SecFlashASec1Off;
+ info->start[1] = baseaddr + SecFlashASec2Off;
+ info->start[2] = baseaddr + SecFlashASec3Off;
+ info->start[3] = baseaddr + SecFlashASec4Off;
+ info->size = 0x10000;
+ info->sector_count = 4;
+ break;
+ case 2:
+ info->start[0] = baseaddr + SecFlashBSec1Off;
+ info->start[1] = baseaddr + SecFlashBSec2Off;
+ info->start[2] = baseaddr + SecFlashBSec3Off;
+ info->start[3] = baseaddr + SecFlashBSec4Off;
+ info->size = 0x10000;
+ info->sector_count = 4;
+ break;
+ }
+ return (info->size);
+}
+
+unsigned long flash_init(void)
+{
+ unsigned long size_b;
+ int i;
+
+ size_b = 0;
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ size_b = flash_get_size(CFG_FLASH_BASE, &flash_info[0], 0);
+
+ if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b == 0) {
+ printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+ size_b, size_b >> 20);
+ }
+
+ /* flash_protect (int flag, ulong from, ulong to, flash_info_t *info) */
+ (void)flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE,
+ (flash_info[0].start[2] - 1), &flash_info[0]);
+#if (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
+ (void)flash_protect(FLAG_PROTECT_SET, 0x203F0000, 0x203FFFFF,
+ &flash_info[0]);
+#endif
+
+ return (size_b);
+}
+
+void flash_print_info(flash_info_t * info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf("missing or unknown FLASH type\n");
+ return;
+ }
+
+ switch (info->flash_id) {
+ case (STM_ID_29W320EB & 0xFFFF):
+ case (STM_ID_29W320DB & 0xFFFF):
+ printf("ST Microelectronics ");
+ break;
+ default:
+ printf("Unknown Vendor: (0x%08X) ", info->flash_id);
+ break;
+ }
+ for (i = 0; i < info->sector_count; ++i) {
+ if ((i % 5) == 0)
+ printf("\n ");
+ printf(" %08lX%s",
+ info->start[i], info->protect[i] ? " (RO)" : " ");
+ }
+ printf("\n");
+ return;
+}
+
+int flash_erase(flash_info_t * info, int s_first, int s_last)
+{
+ int cnt = 0, i;
+ int prot, sect;
+
+ prot = 0;
+ for (sect = s_first; sect <= s_last; ++sect) {
+ if (info->protect[sect])
+ prot++;
+ }
+ if (prot)
+ printf("- Warning: %d protected sectors will not be erased!\n",
+ prot);
+ else
+ printf("\n");
+
+ cnt = s_last - s_first + 1;
+
+#if (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
+ printf("Erasing Flash locations, Please Wait\n");
+ for (i = s_first; i <= s_last; i++) {
+ if (info->protect[i] == 0) { /* not protected */
+ if (erase_block_flash(i) < 0) {
+ printf("Error Sector erasing \n");
+ return FLASH_FAIL;
+ }
+ }
+ }
+#elif (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
+ if (cnt == FLASH_TOT_SECT) {
+ printf("Erasing flash, Please Wait \n");
+ if (erase_flash() < 0) {
+ printf("Erasing flash failed \n");
+ return FLASH_FAIL;
+ }
+ } else {
+ printf("Erasing Flash locations, Please Wait\n");
+ for (i = s_first; i <= s_last; i++) {
+ if (info->protect[i] == 0) { /* not protected */
+ if (erase_block_flash(i) < 0) {
+ printf("Error Sector erasing \n");
+ return FLASH_FAIL;
+ }
+ }
+ }
+ }
+#endif
+ printf("\n");
+ return FLASH_SUCCESS;
+}
+
+int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+ int d;
+ if (addr % 2) {
+ read_flash(addr - 1 - CFG_FLASH_BASE, &d);
+ d = (int)((d & 0x00FF) | (*src++ << 8));
+ write_data(addr - 1, 2, (uchar *) & d);
+ write_data(addr + 1, cnt - 1, src);
+ } else
+ write_data(addr, cnt, src);
+ return FLASH_SUCCESS;
+}
+
+int write_data(long lStart, long lCount, uchar * pnData)
+{
+ long i = 0;
+ unsigned long ulOffset = lStart - CFG_FLASH_BASE;
+ int d;
+ int nSector = 0;
+ int flag = 0;
+
+ if (lCount % 2) {
+ flag = 1;
+ lCount = lCount - 1;
+ }
+
+ for (i = 0; i < lCount - 1; i += 2, ulOffset += 2) {
+ get_sector_number(ulOffset, &nSector);
+ read_flash(ulOffset, &d);
+ if (d != 0xffff) {
+ printf
+ ("Flash not erased at offset 0x%x Please erase to reprogram \n",
+ ulOffset);
+ return FLASH_FAIL;
+ }
+ unlock_flash(ulOffset);
+ d = (int)(pnData[i] | pnData[i + 1] << 8);
+ write_flash(ulOffset, d);
+ if (poll_toggle_bit(ulOffset) < 0) {
+ printf("Error programming the flash \n");
+ return FLASH_FAIL;
+ }
+ if ((i > 0) && (!(i % AFP_SectorSize2)))
+ printf(".");
+ }
+ if (flag) {
+ get_sector_number(ulOffset, &nSector);
+ read_flash(ulOffset, &d);
+ if (d != 0xffff) {
+ printf
+ ("Flash not erased at offset 0x%x Please erase to reprogram \n",
+ ulOffset);
+ return FLASH_FAIL;
+ }
+ unlock_flash(ulOffset);
+ d = (int)(pnData[i] | (d & 0xFF00));
+ write_flash(ulOffset, d);
+ if (poll_toggle_bit(ulOffset) < 0) {
+ printf("Error programming the flash \n");
+ return FLASH_FAIL;
+ }
+ }
+ return FLASH_SUCCESS;
+}
+
+int write_flash(long nOffset, int nValue)
+{
+ long addr;
+
+ addr = (CFG_FLASH_BASE + nOffset);
+ *(unsigned volatile short *)addr = nValue;
+ sync();
+#if (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
+ if (icache_status())
+ udelay(CONFIG_CCLK_HZ / 1000000);
+#endif
+ return FLASH_SUCCESS;
+}
+
+int read_flash(long nOffset, int *pnValue)
+{
+ unsigned short *pFlashAddr =
+ (unsigned short *)(CFG_FLASH_BASE + nOffset);
+
+ *pnValue = *pFlashAddr;
+
+ return TRUE;
+}
+
+int poll_toggle_bit(long lOffset)
+{
+ unsigned int u1, u2;
+ volatile unsigned long *FB =
+ (volatile unsigned long *)(CFG_FLASH_BASE + lOffset);
+ while (1) {
+ u1 = *(volatile unsigned short *)FB;
+ u2 = *(volatile unsigned short *)FB;
+ u1 ^= u2;
+ if (!(u1 & 0x0040))
+ break;
+ if (!(u2 & 0x0020))
+ continue;
+ else {
+ u1 = *(volatile unsigned short *)FB;
+ u2 = *(volatile unsigned short *)FB;
+ u1 ^= u2;
+ if (!(u1 & 0x0040))
+ break;
+ else {
+ reset_flash();
+ return FLASH_FAIL;
+ }
+ }
+ }
+ return FLASH_SUCCESS;
+}
+
+void reset_flash(void)
+{
+ write_flash(WRITESEQ1, RESET_VAL);
+ /* Wait for 10 micro seconds */
+ udelay(10);
+}
+
+int erase_flash(void)
+{
+ write_flash(WRITESEQ1, WRITEDATA1);
+ write_flash(WRITESEQ2, WRITEDATA2);
+ write_flash(WRITESEQ3, WRITEDATA3);
+ write_flash(WRITESEQ4, WRITEDATA4);
+ write_flash(WRITESEQ5, WRITEDATA5);
+ write_flash(WRITESEQ6, WRITEDATA6);
+
+ if (poll_toggle_bit(0x0000) < 0)
+ return FLASH_FAIL;
+
+ return FLASH_SUCCESS;
+}
+
+int erase_block_flash(int nBlock)
+{
+ long ulSectorOff = 0x0;
+
+ if ((nBlock < 0) || (nBlock > AFP_NumSectors))
+ return FALSE;
+
+ /* figure out the offset of the block in flash */
+ if ((nBlock >= 0) && (nBlock < SecFlashABegin))
+ ulSectorOff = nBlock * AFP_SectorSize1;
+
+ else if ((nBlock >= SecFlashABegin) && (nBlock < NUM_SECTORS))
+ ulSectorOff =
+ SecFlashAOff + (nBlock - SecFlashABegin) * AFP_SectorSize2;
+ /* no such sector */
+ else
+ return FLASH_FAIL;
+
+ write_flash((WRITESEQ1 | ulSectorOff), WRITEDATA1);
+ write_flash((WRITESEQ2 | ulSectorOff), WRITEDATA2);
+ write_flash((WRITESEQ3 | ulSectorOff), WRITEDATA3);
+ write_flash((WRITESEQ4 | ulSectorOff), WRITEDATA4);
+ write_flash((WRITESEQ5 | ulSectorOff), WRITEDATA5);
+
+ write_flash(ulSectorOff, BlockEraseVal);
+
+ if (poll_toggle_bit(ulSectorOff) < 0)
+ return FLASH_FAIL;
+ printf(".");
+
+ return FLASH_SUCCESS;
+}
+
+void unlock_flash(long ulOffset)
+{
+ unsigned long ulOffsetAddr = ulOffset;
+ ulOffsetAddr &= 0xFFFF0000;
+
+ write_flash((WRITESEQ1 | ulOffsetAddr), UNLOCKDATA1);
+ write_flash((WRITESEQ2 | ulOffsetAddr), UNLOCKDATA2);
+ write_flash((WRITESEQ3 | ulOffsetAddr), UNLOCKDATA3);
+}
+
+int get_codes()
+{
+ int dev_id = 0;
+
+ write_flash(WRITESEQ1, GETCODEDATA1);
+ write_flash(WRITESEQ2, GETCODEDATA2);
+ write_flash(WRITESEQ3, GETCODEDATA3);
+
+ read_flash(0x0402, &dev_id);
+ dev_id &= 0x0000FFFF;
+
+ reset_flash();
+
+ return dev_id;
+}
+
+void get_sector_number(long ulOffset, int *pnSector)
+{
+ int nSector = 0;
+ long lMainEnd = 0x400000;
+ long lBootEnd = 0x10000;
+
+ /* sector numbers for the FLASH A boot sectors */
+ if (ulOffset < lBootEnd) {
+ nSector = (int)ulOffset / AFP_SectorSize1;
+ }
+ /* sector numbers for the FLASH B boot sectors */
+ else if ((ulOffset >= lBootEnd) && (ulOffset < lMainEnd)) {
+ nSector = ((ulOffset / (AFP_SectorSize2)) + 7);
+ }
+ /* if it is a valid sector, set it */
+ if ((nSector >= 0) && (nSector < AFP_NumSectors))
+ *pnSector = nSector;
+
+}
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